The diagram shows changing wavelengths along the electromagnetic spectrum. which labels belong in the areas marked y and z? y: ultraviolet z: radio y: gamma rays z: visible light y: x-rays z: infrared y: radio z: gamma rays

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

If element x has 99 protons how many electrons does it have